.box {
    width: 500px;
    height: 650px;
    margin: 20px auto;
}

.box h1 {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.box h1 button {
    padding: 15px;
    cursor: pointer;
}

.box canvas {
    box-shadow: 0 0 5px gray;
    margin: 0 auto;
    display: block;
}

.log {
    width: 100%;
    height: 100px;
    overflow: auto;
    background-color: rgb(222, 216, 216);
    margin-top: 10px;
    resize: none;
}
